I just flashed latest Gaia/Gecko master, and do not see this, the text is left aligned, see screenshot. This is also how it shows up if the text is in English, but shown in Arabic UI.
So going to close as a worksforme, probably fixed by an intermediate change. I have not checked the 2.2 branch, but I do not know of any email changes that would be on master but not on 2.2 that would affect this.